THE MINERAL INDUSTRY OF CALIFORNIA 
 
 
Table 15.'—~Sand and gravel production in 1967, by counties 
(Thousand short tons and thousand dollars) 
155 
County 
Quantity 
Value 
County 
Quantity 
Value 
Alameda -Butte                  Colusa                Del Norte         
     El Dorado               Fresno               Glenn                 
Humboldt               Imperial                Inyo                Kern 
                Kings                Lake                   Lassen      
           
10,341 
1,565 
658 
378 
180 
6,630 
333 
754 
3,160 
427 
3,059 
325 
415 
328 
$12,389 
1,770 
 610 
 392 
 313 
8,051 
 W 
 969 
4,090 
 552 
4,366 
 325 
 539 
 392 
Plumas                
Riverside               
Sacramento             
San Bernardino          
San Diego              
San Joaquin             
San Luis Obispo          
Santa Barbara           
Santa Clara             
Santa Cruz       '  
Shasta                 
Sierra                 
Siskiyou                
Solano                 
426 
5,572 
5,023 
5,611 
6,609 
2,931 
459 
1,593 
3,019 
1,500 
2,383 
174 
637 
40 
$449 
8,062 
6,416 
6,251 
9,932 
3,798 
611 
1,552 
2,869 
1,680 
1,941 
234 
642 
47 
Los Angeles               
Madera                  
Mariposa                
Mendocino               
22,246 
1,285 
 50 
726 
24,957 
1,468 
 68 
919 
Sonoma                
Stanislaus              
Sutter                 
Tehama                
2,318 
938 
114 
410 
2,206 
1,137 
114 
423 
Merced                
Modoc                
1,748 
198 
2,254 
W 
Trinity                
Tuolumne              
136 
90 
159 
90 
Mono                   
147 
149 
Ventura                
3,775 
3,544 
Monterey                
Naps                   
Nevada                  
Orange                  
Placer                   
978 
44 
641 
8,575 
454 
1,902 
60 
1,061 
8,521 
625 
Yolo                  
Yuba                  
Other counties'          
 
Total             
 2,018 W 1,004 1,232 3,700 9,081 
 116,125 139,212 
 
W Withheld to avoid disclosing individual company confidential data; included
with "Other Counties." 
 Includes Alpine, Amador, Calaveras, Contra Costa, Mann, San Benito, San
Francisco, San Mateo, and Tulare. 
 
riprap as major flood control and water resource projects were completed.
Declines were reported for all stone categories. The demand for limestone
and oystershell for use in making cement and lime was about 1 million tons
below the 1966 level. The output of stone for concrete aggregate and roadstone
also was down 1 million tons. Basalt quarries in the San Francisco Bay Area
counties of Alameda, Napa, and Sonoma supplied aggregate for the Bay Area
Rapid Transit (BART) system construction. Because of reduced re3idential
construction, basalt quarries in Contra Costa and Mann Counties were idle
throughout the year, but sandstone output in Contra Costa County was relatively
high in order to meet BART and freeway needs. 
 A generally depressed construction industry required less marble for terrazzo
and roofing granules; less sand-stone, quartz, and quartzite for cement and
brick manufacture;, and much less dimension stone for use in building construction.
The output of slate was off 6,000 tons from that in 1966. A drop in the tonnage
of decomposed granite for subsurfacing roads and base material for building
construction was partly offset by the production of 
granite from southern California quarries for harbor development and building
of offshore well-drilling islands. 
 
 Sulfur.—Eight companies recovered elemental sulfur from sour natural
gas and refinery gases at nine plants in three counties—three in Contra
Costa, five in Los Angeles, and one in San Luis Obispo. In all instances
the Klaus process, or a modification, was used to recover the sulfur. Production
and shipments rose 2 and 16 percent, respectively, compared with 1966 levels.
Douglas Oil Co., Los Angeles County, began production late in 1966 and Shell
Oil Co., Contra Costa County, went onstream early in 1967. 
 Sulfur ore was produced by only one company, Inyo Soil Sulphur Co., which
produced and shipped sulfur ore from the Crater deposit, Inyo County. The
tonnage shipped was slightly higher than in 1966 but the value declined 42
percent. 
 
 Talc, Soapstone, and Pyrophyllite.— Mine output and shipments to grinders
of talc, soapstone, and pyrophyllite rose 4 and 6 percent, respectively,
from 1966 levels while sales to consumers dropped 8 percent. Consumption,
all categories, was up 13 percent with the most notable ton-